The transmission should know the brake pedal is depressed; there is a safety switch that prevents the user from shifting out of neutral unless the brake pedal is depressed.

Well - I can switch from D to R through N so - you are right - the car knows the brake is down.

Quote:

Originally Posted by markled

Torque converter clutch lockup?

It could be related to clutch. I'll try to look into how the Tiptornic transmission is working so that I can have a better understanding of what is going on. Do you have any suggestion on where to start reading?

Quote:

Originally Posted by 06BMWX3

I'm pretty sure all X3's are DBW(Drive by Wire) since 2004, meaning there is no cable between the gas pedal and engine throttle.

My mistake - Sorry ! I though you were saying Shift by Wire.

Hmmm... Could it be related to DBW ? What would happen if I keep the brake down and try pressing the gas. I'm not doing that obviously, I'm just tinking if I could simulate the fault as the dealer claims that, although they believe my complaint is legit, they could not reproduce the fault.